x squared + C.
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take out the constant -2 then take the intergral of cosx this will give you sinx your answer is -2sinx
4
(2x - 3)(2x + 3)(2x-3)(2x+3)
Assuming that 4x2+2x = 0: 2x (2x+1) = 0 2x = 0 or 2x+1 = 0 x = 0 or -1/2
x=1